402 

FXUS63 KIWX 301002

AFDIWX



Area Forecast Discussion

National Weather Service Northern Indiana

502 AM EST Tue Dec 30 2025



.KEY MESSAGES...



- More light snow today into early tonight. Snowfall amounts

  generally less than 2 inches, highest near Lake Michigan.

  

- An upper level disturbance will bring even more light snow of

  1 to 3 inches early Wednesday afternoon into Wednesday night.

 

- Wind chill values will be frequently dipping to between zero 

  and 10 above the next 3 nights.



&&



.DISCUSSION...

Issued at 345 AM EST Tue Dec 30 2025



Strong winds have diminished some from yesterday; however, the

winds were still gusting up to 25 mph as a deep upper low

lingered east of James Bay. Challenges over the next few days

will include chances, coverage and snow amounts from clipper

type systems or impulses racing southeast into the forecast

area. At the onset, a very cold airmass had taken up residence

over the Upper Great Lakes. Temperatures will stay much below

normal for this time of year. Thermal profiles keep temperatures

below 0C the next few days with the indicated precipitation as 

all snow. The DGZ should stay in the cloud layer and will favor

accumulating snow. All considered, snowfall amounts should 

range from 1 to 3 inches with this first system with the highest

amounts near Lake Michigan. The second fast moving systems will

bring snow in a 12 hour window from 18Z Wednesday (1 pm EDT) to

06Z Wednesday night (early Wednesday night). Otherwise, the

first several days of 2026 will favor temperatures near to below

normal with dry weather. The deep low north of the area should

persist; however, some upstream ridging from further upstream

teleconnections should allow temperatures to rise near to above

normal early next week.



&&



.AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/...

Issued at 1224 AM EST Tue Dec 30 2025



The main trough that has caused the snow and wintry weather begins 

to pull eastward away from the area into Tuesday meanwhile surface 

high pressure pokes into the area. As a result, dry air helps to 

shut off lake effect snow this morning ahead of a clipper system as 

winds adjust to be out of the south. Some combination of system and 

lake enhanced snow is reinvigorated for the end of the TAF period 

starting later this afternoon at SBN.



Underneath the surface inversion, low level moisture still keeps 

MVFR CIGs and the times of snow may provide times of lowered

VISBY.



&&



.IWX WATCHES/WARNINGS/ADVISORIES...

IN...None.

OH...None.

MI...None.

MARINE...Small Craft Advisory until 7 PM EST Wednesday for LMZ043-046.



&&



$$



DISCUSSION...Skipper

AVIATION...Roller